# ICU vs Math riddles challenge

The clearest difference is update cadence: Math riddles challenge at weekly against ICU's every 2 months. Math riddles challenge also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ICU ships an update every 2 months, Math riddles challenge weekly. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ICU | Math riddles challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 75 MB | 22 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Be Yourself Ventures Ltd.](https://appshunter.io/developer/1469881783) | [Merbin Joe](https://appshunter.io/developer/1281696078) |

## What reviewers say

### ICU

[App page](https://appshunter.io/ios/app/icu-i-challenge-u/id1532722832)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math riddles challenge

[App page](https://appshunter.io/ios/app/math-riddles-challenge/id1668806527)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ICU free?

ICU is free to download, with no in-app purchases.

### Is Math riddles challenge free?

Math riddles challenge is free to download, with no in-app purchases.

### Do ICU or Math riddles challenge have ads?

Both ICU and Math riddles challenge show ads.

### Which is updated more often, ICU or Math riddles challenge?

ICU ships an update every 2 months, and Math riddles challenge weekly. Most recently, ICU was updated on October 14, 2026 and Math riddles challenge on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*